Mitsubishi MU-GE50VB-E1, MUH-GE50VB-E1 Service Manual

SPLIT-TYPE AIR CONDITIONERS

OUTDOOR UNIT

SERVICE MANUAL

Models

MU-GE50VBMUH-GE50VB-

HFC

utilized

R410A

Indoor unit service manual MS/MSH-GE

No. OBH530

•VB Series (OBH529)

CONTENTS

10. SERVICE FUNCTIONS ···································· 17

11. TROUBLESHOOTING ····································· 17

12. DISASSEMBLY INSTRUCTIONS ···················· 23

NOTE:

• This service manual describes technical data of outdoor units.

1. TECHNICAL CHANGES ··································· 2

2. PART NAMES AND FUNCTIONS ····················· 3

3. SPECIFICATION ················································ 3

4. NOISE CRITERIA CURVES ······························ 4

5. OUTLINES AND DIMENSIONS ························ 5

6. WIRING DIAGRAM ············································ 6

7. REFRIGERANT SYSTEM DIAGRAM ··············· 7

8. PERFORMANCE CURVES ······························· 8

9. ACTUA TOR CONTROL ··································· 16

PARTS CATALOG (OBB530)

MU-GA50VB-

1. Unit size has been changed. (W 850 mm × H 605 mm × D 290 mm W 800 mm × H 550 mm × D 285 mm)

2. Outdoor fan motor has been changed. (RA6V50-PA RA6V33-KA)

MUH-GA50VB-

1. Unit size has been changed. (W 850 mm × H 605 mm × D 290 mm W 800 mm × H 550 mm × D 285 mm)

2. Outdoor fan motor has been changed. (RA6V60-MA RA6V33-KB)

TECHNICAL CHANGES

MU-GE50VB-

MUH-GE50VB-

PART NAMES AND FUNCTIONS

MU-GE50VB MUH-GE50VB

Air inlet back and side

Piping

Drain hose

Air outlet

Drain outlet

Outdoor model MU-GE50VB MUH-GE50VB Function Cooling Cooling Heating

Power supply Capacity kW 5.0 5.0 5.2

Electrical

Coefﬁ cient of performance (C.O.P) (Total)

Fan

Dimensions W H D mm 800 Weight kg 38 40

Special

NOTE: Test conditions are based on ISO 5151. Cooling: Indoor Dry-bulb temperature 27°C Wet-bulb temperature 19°C Outdoor Dry-bulb temperature 35°C Wet-bulb temperature 24°C Heating: Indoor Dry-bulb temperature 20°C Wet-bulb temperature -°C Outdoor Dry-bulb temperature 7°C Wet-bulb temperature 6°C Indoor-Outdoor piping length: 5 m

SPECIFICATION

Single phase 230 V, 50 Hz

Breaker capacity A 15 15 Running current (Total) Power input (Total) W 1,810 1,780 1,610

data

Power factor (Total) % 96 94 Starting current (Total)

Model RN196VHSHT RN196VHSHT Output W 1,300 1,300

Compressor

Compressor motor current Model RA6V33-KA RA6V33-KB Fan motor current A 0.33 0.33

motor

Dehumidiﬁ cation /h 2.5 2.5 Air ﬂ ow /h 1,902 1,902 Sound level dB 52 52 Fan speed rpm 855 855 Fan speed regulator 1 1

remarks

Refrigerant ﬁ lling capacity (R410A)

Refrigeration oil (Model)

A 8.20 8.23 7.53

A37 37

2.76 2.81 3.23

A 7.57 7.60 6.90

550 285 800 550 285

kg 1.35 1.45 cc 520 (NEO 22) 520 (NEO 22)

MUH-GE50VB

ACCESSORIES

Drain socket

Single phase 230 V, 50 Hz

MU-GE50VB

NOISE CRITERIA CURVES

COOL

SPL(dB(A))LINE

FUNCTION

Test conditions, Cooling :Dry-bulb temperature35°C Wet-bulb temperature24°C

MUH-GE50VB

FUNCTION

COOLING

HEATING

SPL(dB

Test conditions, Cooling :Dry-bulb temperature35°C Wet-bulb temperature24°C Heating :Dry-bulb temperature 7°C Wet-bulb temperature 6°C

(A))LINE

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

NC-10 NC-10

OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR

63 125 250 500 1000 2000 4000 8000

BAND CENTER FREQUENCIES, Hz

NC-70

NC-60

NC-50

NC-40

NC-30

NC-20

OUTDOOR UNIT

MICROPHONE

OUTLINES AND DIMENSIONS

MU-GE50VB MUH-GE50VB

OUTDOOR UNIT

344.5

285

550

Air in

22.3

Handle

280

400

Air in

2 holes 10×21

Air out

150

302.5 500 Bolt pitch for installation

Drain hole ø42

800

Unit: mm

REQUIRED SPACE

100mm or more

304~325

installation

Bolt pitch for

17.5 23

Service panel

Liquid refrigerant pipe joint Refrigerant pipe (flared) ø6.35

35°

164.5

99.5

170.5

Service port

Gas refrigerant pipe joint Refrigerant pipe (flared) ø12.7

200mm or more

Open two sides of left, right, or rear side.

43°

Basically open 100mm or more without any obstruction in front and on both sides of the unit.

100mm or more

350mm or more

MU-GE50VB

WIRING DIAGRAM

MUH-GE50VB

REFRIGERANT SYSTEM DIAGRAM

MU-GE50VB

OUTDOOR UNIT

Refrigerant pipe 12.7 (with heat insulator)

Flared connection

Stop valve (with service port)

Stop valve

Unit :mm

Muffler

Outdoor heat exchanger

Compressor

Strainer #100

Refrigerant pipe 6.35 (with heat insulator)

MUH-GE50VB

OUTDOOR UNIT

Refrigerant pipe ø12.7 (with heat insulator)

Flared connection

Stop valve (with service port)

Strainer #100

Capillary tube

3.0 x 1.6 x 450

4-way valve

Muffler

Compressor

Check valve

Outdoor heat exchanger

Capillary tube ø3.0 × ø1.8 × 600 (2 pcs)

Capillary tube ø3.0 × ø1.6 × 500

Refrigerant pipe ø6.35 (with heat insulator)

Stop valve

Capillary tube ø3.0 × ø1.6 × 300

R.V. coil heating ON cooling OFF

Defrost thermistor RT61

Refrigerant flow in cooling Refrigerant flow in heating

MAX. REFRIGERANT PIPING LENGTH

Model

MU-GE50VB MUH-GE50VB

Refrigerant piping: m

Max. lengthAMax. height

Piping size O.D: mm

Gas

12.7

MAX. HEIGHT DIFFERENCE

Indoor unit

Refrigerant Piping

Max. height B

Max. length

ADDITIONAL REFRIGERANT CHARGE (R410A: g)

Model

MU-GE50VB

MUH-GE50VB

Outdoor unit precharged

1350 1450

7 m

Length of connecting pipe: m

Liquid

6.35

Outdoor unit

Refrigerant piping length (one way)

10 m

Indoor unit

Gas 0.43

Liquid 0.5

15 m

160

Calculation : Xg = 20 g/m × (A-7)m

20 m

260

Outdoor unit

Gas 0

Liquid 0

25 m

360

PERFORMANCE CURVES

MU-GE50VB MUH-GE50VB

The standard specifications apply only to the operation of the air conditioner under normal conditions, since operating conditions vary according to the areas where these units are installed. The following information has been provided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve.

(1) GUARANTEED VOLTAGE

198~264 V

(2) AIR FLOW

Air flow should be set at MAX.

(3) MAIN READINGS

(1) Indoor intake air wet-bulb temperature: °CWB (2) Indoor outlet air wet-bulb temperature: °CWB (3) Outdoor intake air dry-bulb temperature: °CDB (4) Total input: W (5) Indoor intake air dry-bulb temperature: °CDB (6) Outdoor intake air wet-bulb temperature: °CWB (7) Total input: W

Indoor air wet/dry-bulb temperature difference on the left side of the following chart shows the difference between the indoor intake air wet/dry-bulb temperature and the indoor outlet air wet/dry-bulb temperature for your reference at service.

Cooling

}

Heating (MUH-GE50VB)

}

How to measure the indoor air wet-bulb/dry-bulb temperature difference

1. Attach at least 2 sets of wet and dry-bulb thermometers to the indoor air intake as shown in the figure, and at least 2 sets of wet and dry-bulb thermometers to the indoor air outlet. The thermometers must be attached to the position where air speed is high.

2. Attach at least 2 sets of wet and dry-bulb thermometers to the outdoor air intake.

Cover the thermometers to prevent direct rays of the sun.

3. Check that the air filter is cleaned.

4. Open windows and doors of room.

5. Press the EMERGENCY OPERATION switch once (twice) to start the EMERGENCY COOL

[HEAT (MUH-GE50VB)]

6. When system stabilizes after more than 15 minutes, measure temperature and take an average temperature.

7. 10 minutes later, measure temperature again and check that the temperature does not change.

MODE.

INDOOR UNIT

Wet and dry-bulb thermometers

8-1. CAPACITY AND THE INPUT CURVES

11.6

10.6

9.6

8.6

7.7

difference(degree)

6.9

Indoor air Wet-bulb temperature

Indoor intake air Wet-bulb temperature

OUTDOOR UNIT

Wet and dry-bulb thermometers

ulb temperature

t-b

Indoor intake air

MUH-GE50VB

MU-GE50VB

26.6

24.5

22.5

20.4

18.4

16.3

difference(degree)

14.3

Indoor air Dry-bulb temperature

12.3

MUH-GE50VB

Outdoor intake air Dry-bulb temperature

lb temperature

oor intake air Dry-bu

Ind

Outdoor intake air Wet-bulb temperature

NOTE: The above curves are for the heating operation without any frost.

Outdoor intake air Dry-bulb temperature

intake air Dry-bulb temperature

oor

Ind

Outdoor intake air Wet-bulb temperature

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